ktcanuck,

There is an updated operating manual on RCV's website. It recommends hanging your model nose up. That would alleviate the possible issue with oil build-up at the piston base after it has been run. From my experience thus far with my engine, it really blows a lot of oil out that vent tube while running, so I never considered it as a potential problem. The crankcase vent actually has enough pressure that you can attach the vent tube to your muffler via a second nipple and vent the oil out your exhaust. At any rate, you might want to start another thread and, in the title, address it as a question to Keith Lawes. He invented the engine and drops in occasionally to personally answer questions. If you do this, it might keep others from responding and give Keith a chance to answer your questions. I know he put my mind at ease by answering my questions.

Good luck,
Joe